Method for transmitting and receiving downlink control information in a wireless communication system and apparatus for the same

Abstract

A method for receiving a downlink signal in a user equipment of a wireless communication system from a base station comprises the steps of receiving control information from either a downlink control channel or a legacy downlink control channel in accordance with a previously set condition; and receiving a downlink shared channel or a legacy downlink shared channel on the basis of the control information, wherein the downlink control channel is received through a data region of a subframe, and the legacy downlink control channel is received through a control region of the subframe, the control information of the downlink control channel includes allocation information of the downlink shared channel, and the control information of the legacy downlink control channel includes allocation information of the downlink shared channel or the legacy downlink shared channel.

The invention claimed is: 
     
       1. A method for receiving downlink channels in a user equipment (UE) at a wireless communication system from a base station, the method comprising:
 configuring, by the UE, a common search space and a UE specific search space via a higher layer; 
 receiving, by the UE, a first downlink control channel by monitoring the common search space, or a second downlink control channel by monitoring the UE specific search space; and 
 receiving, by the UE, a broadcast channel based on information included in the first downlink control channel, or a downlink shared channel based on information included in the second downlink control channel, 
 wherein the first downlink control channel is monitored in subframes where the second downlink control channel is not monitored, 
 wherein subframes to receive the broadcast channel are configured via the higher layer, 
 wherein the second downlink control channel is not monitored in subframes configured to receive the broadcast channel, and 
 wherein the second downlink control channel is an enhanced physical downlink control channel (E-PDCCH). 
 
     
     
       2. The method according to  claim 1 , wherein, if the first downlink control channel includes information on the broadcast channel, the first downlink control channel is received by monitoring the common search space. 
     
     
       3. A user equipment (UE) in a wireless communication system, the user equipment comprising:
 a wireless communication module configured to receive downlink channels from a base station; and 
 a processor configured to: 
 monitor a common search space to receive a first downlink control channel, or monitor a UE specific search space to receive a second downlink control channel, and 
 control the wireless communication module to receive a broadcast channel based on information included in the first downlink control channel, or a downlink shared channel based on information included in the second downlink control channel, 
 wherein the first downlink control channel is monitored in subframes where the second downlink control channel is not monitored, 
 wherein subframes to receive the broadcast channel are configured via a higher layer, 
 wherein the second downlink control channel is not monitored in subframes configured to receive the broadcast channel, and 
 wherein the second downlink control channel is an enhanced physical downlink control channel (E-PDCCH). 
 
     
     
       4. The UE according to  claim 3 , wherein, if the first downlink control channel includes information on the broadcast channel, the processor monitors the common search space to receive the first downlink control channel.